Water Movement and Regulation

Question 0

Diffusion

Answer 0

Dispersion of a substance that tends to equalize concentrations

Question 1

Water Potential

Answer 1

Chemical potential of water (ability to move from high to low concentration

Question 2

Osmosis

Answer 2

Movement of water from high to low concentration

Question 3

Bull Flow

Answer 3

Movement of liquid in one direction (all together)

Question 4

Root Pressure

Answer 4

1) Ions are actively transported into a root; Lowers water potential inside root
2) Water moves into root and increases the pressure
3) Pressure pushes water up xylem

Question 5

Cohesion-Tension Theory

Step 1

Answer 5

Areas of the leaf not occupies by cells is filled with moist air. The water moves out of the leaf to the atmosphere by a water potential gradient

Question 6

Cohesion-Tension Theory

Step 2

Answer 6

As water evaporates, the water concentration drops and creates tension which pulls water from the surrounding mesophyll cells, which leads to pulling water out of the xylem.

Question 7

Cohesion-Tension Theory

Step 3

Answer 7

The tension is transmitted from water in leaf xylem through stem xylem, all the way to root xylem by cohesion.

Question 8

Cohesion-Tension Theory

Step 4

Answer 8

Tension pulls water from root cortex cells into root xylem

Question 9

Cohesion-Tension Theory

Step 5

Answer 9

Tension pulls water from soil into the roots